Memory effects in EM emission during uniaxial deformation of dielectric Crystalline materials

It is known that during uniaxial compression of dielectric crystalline materials, acoustic and electromagnetic (EM) emission is detected. Such emissions are of particular interest, since they are related to the physical processes taking place during the preparation stage of an earthquake. In this le...

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Bibliographic Details
Published in:IEEE geoscience and remote sensing letters 2005-04, Vol.2 (2), p.118-120
Main Authors: Hadjicontis, V., Tombras, G.S., Ninos, D., Mavromatou, C.
Format: Article
Language:English
Subjects:
"Kaiser effect"
Acoustic emission
Acoustic materials
Acoustic signal detection
Crystalline materials
Dielectrics
earthquake precursors
Earthquakes
electromagnetic (EM) emission
Instruments
Laboratories
microfracturing electrification
Physics
Tensile stress
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Summary:It is known that during uniaxial compression of dielectric crystalline materials, acoustic and electromagnetic (EM) emission is detected. Such emissions are of particular interest, since they are related to the physical processes taking place during the preparation stage of an earthquake. In this letter, we report recent experimental results on the memory effects observed in the EM emission during successive cyclic mechanical loading-unloading of LiF crystal samples in a similar fashion, as it has been described by the so-called "Kaiser effect," i.e., the memory effect for the acoustic emission, and we discuss on a conceptual explanation.
ISSN:1545-598X
1558-0571
DOI:10.1109/LGRS.2004.842472